CAIs main content.

Exhibition Text

A solar system such as our own begins when a massive gas and dust cloud collapses on itself and starts to spin. At first the temperature increases dramatically near the center of the spinning disk, where a young star begins to radiate energy. But gradually, the disk cools. As the temperature drops, solid particles begin to condense in the central region. The first rocks to condense in our solar system are known as calcium-aluminum inclusions, or CAIs. These oldest rocks can still be found in certain "primitive" meteorites.

Cosmic snowf